359 citations · 624 across the 39 of their papers we have counts for
4 papers · 2 filters
Gravitational Waves from Phase Transitions
Djuna Croon, David J. Weir
We summarise the physics of first-order phase transitions in the early universe, and the possible ways in which they might come about. We then focus on gravitational waves, emphasi…
Hot Leptogenesis
Michael J. Baker, Ansh Bhatnagar, Djuna Croon +1
We investigate a class of leptogenesis scenarios in which the sector containing the lightest right-handed neutrino establishes kinetic equilibrium at a temperature $T_{N_1} > T_\te…
Cosmology and Astrophysics of CP-Violating Axions
Omar F. Ramadan, Jeremy Sakstein, Djuna Croon
We study the cosmology and astrophysics of axion-like particles (ALPs) with CP-violating Yukawa couplings to nucleons. At finite nucleon density, the ALP's dynamics is governed by…
Dark Dwarfs: Dark Matter-Powered Sub-Stellar Objects Awaiting Discovery at the Galactic Center
Djuna Croon, Jeremy Sakstein, Juri Smirnov +1
We investigate the effects of dark matter annihilation on objects with masses close to the sub-stellar limit, finding that the minimum mass for stable hydrogen burning is larger th…